Indexing and control mechanism for a metal working machine



INDEXING AND CONTROL MECHANISM FOR A METAL WORKING MACHINE eSheets-sheet 1 Original. Filed Nov. 6, 1929 s'SPL 25, 1934- E. J.KINGSBURY l-:T AL 1,975,005

INDEXING AND CONTROL MECHANISM FOR A METAL WORKING MACHINE OriginalFiled Nov. 6, 1929 6 Sheets-Sheet 2 Ifve1o60r5^ Sept 25, 1934- E. .1.KINGsBURY Er A1. 1,975,005

INDEXING AND CONTROL MECHANISM FOR A METAL WORKING MACHINE OriginalFiled Nov. 6, 1929 6 Sheets-Sheet 5 INDEXING AND CONTROL MECHANISM FOR AMETAL WORKING MACHINE Original Filed Nov. 6, 1929 6 Sheets-Sheet 4 Iwnors wml/EM Sept 25, 1934 E. J. KINGSBURY r-:r Ax. 1,975,005

INDEXING AND CONTROL MECHANISM FOR A METAL WORKING MACHINE originalFiled Nov. 6,V 1929 e Smeets-sheet 5 135715 l y 1p/i7@ Sept. 25, 1934.E. J. KINGsBURY ET A1. 1,975,005

INDEXING' AND CONTROL MECHANISM FOR A METAL WORKING MACHINE OriginalFiled Nov. 6, 1929 6 Sheets-Sheet 6 W A Gttorneg '5 Patented Sept. 25,1934 UNITED STATES PATENT OFFICE INDEXING AND CONTROL MECHANISM FOR AMETAL WORKING MACHINE Application November 6, 1929, Serial No. 405,172Renewed February 21, 1934 4o claims.

The invention relates to a new and useful improvement in an indexing andcontrol mechanism for a metal working machine wherein the material to beoperated upon is presented in succession to 6 a series of metalworkingunits.

An object of the invention is to provide an indexing and controlmechanism for a machine of the above character wherein the indexingdevice operates through a control means for initiating the operation ofthe metal working units and the metal working units in turn operatethrough a control mechanism for initiating the next cycle of operationof the indexing device after each metal working unit has completed itsoperation. 15 A further object of the invention is to provide a machineof the above type wherein th`e operation of the control means for theindexing device is rendered ineffective until the wor-king tool at eachmetal working unit is fully retracted from engagement with the materialoperated upon.

A further object of the invention is to provide a machine of the abovetype with fiuid pressure controlled means operating in common on theindexing device and the metal working units, which fluid pressure meansis under manual control for starting and stopping the machine.

A still further object of the invention is to provide an indexing deviceand control mechanism of the above type wherein the indexing turret isrotated intermittently by a motor driven actuating device.

A still further object of the invention is to provide an indexing andcontrol mechanism of the above type wherein the motor driven actuatingdevice includes a friction clutch which is automatically released uponstoppage of the movement of the indexing turret.

These and other objects will in part be obvious and will in part behereinafter more fully dis- .40 closed.

In the drawings which show by way of illustration one embodiment of theinvention:-

Figure 1 is a plan view showing diagrammatically the layout of a machineembodying the in- 45 vention.

Fig. 2 is a similar diagrammatic layout in side view of the machine,only two of the metal Working units being illustrated.

Fig. 3 is a horizontal sectional view through the 50 motor drivenactuating device for the indexing turret.

Fig. 4 is a vertical sectional view through said motor driven actuatingdevice, in a plane parallel to the motor shaft and showing the frictiondriv- 55 ing clutch.

Fig. 4a is a horizontal sectional view through the uid pressure controlvalve at the indexing turret.

Fig. 5 is a vertical sectional view through said motor driven mechanismin a plane at right angles 6o to the main actuating shaft and showingthe worm gear connection for driving the turret.

Fig. 6 is a top plan view of the indexing turret with the work holdersremoved.

Fig. 7 is a vertical sectional view through the 65 indexing turret.

The invention is directed to an indexing and control mechanism for ametal working machine including a series of metal working units. Thesemetal Working units may be drill spindles, milling spindles or any othersuitable metal operating units. The metal working units are preferablyprovided with tools for operating in sequence upon a piece of metal foraccomplishing the desired result. Associated with these working units isa work holding turret or indexing device which presents the vmaterialrst to one metal working unit and then to another. The indexing turretis operated by a motor driven actuating device which preferably includesa friction clutch adapted to separate and automatically disconnect theactuating mechanism from the indexing turret provided said indexingturret in one operation engages an obstruction and stops. The indexingturret is preferably driven by a motor driven actuating device whichimparts an intermittent rotation thereto.

Each metal working unit is preferably motor driven and includes anactuating spindle carrying the operating tool. Means is provided for 9orotating the tool and for feeding the tool forward into engagement withthe material and for retracting the tool when the operation iscompleted. Each working unit, therefore, includes an automatic startingand stopping mechanism. The motor driven actuating device for operatingthe indexing turret is also provided with automatic means for startingand stopping the actuation of the turret. The control system for theindexing turret and the metal working units is preferably of the fluidpressure type. 'I'here is a pipe leading from a source of iluid underpressure which is connected with the control mechanism for the indexingdevice and also connected with each control mechanism for the metalworking units.

Associated with the indexing turret is a control valve for fluidpressure. There is a pipe leading from the source of fluid supply tothis valve, and there is a pipe leading from this control valve to theautomatic starting and stopping mechanism of each metal working unit.When the indexing turret has properly positioned the material for theoperation of the metal working units, the valve is opened so as to startthe metalworking units, and after having started the metal workingunits, the valve closes, shutting off the liiuid supply so that eachmetal working unit after it completes its cycle may be automaticallystopped.

As noted, each metal working unit is provided with means forautomatically stopping the same when the tool has finished its operationand is withdrawn from the material.A Associated with each metal workingunit is a valve which is connected to the pressure controlled means sothat the iluid pressure is shut olf from the indexing and controlmechanism until each of the metal working units has completed itsoperation after which the actuating'mechanism for the index device isset into operation.

Referring more in detail to the drawings, in Figs. i. and 2 of thedrawings, the layout of the machine embodying the invention is showndiagrammatically and the machine includes an indexing turret lassociated with which is a series 'ci metal working units, three ofwhich are indicated in the drawings at 2, 3 and 4 respectively. Et isunderstood that a number of units may be provided and the control systemreadily adjnsted to the additional units. The indexing device isprovided. with a series of work holders 5, 5. Each metal working unitincludes a spindle 6 provided with a working tool 7. The metal i,working units illustrated are of the type shown in Patent #1,780,083granted to Edward J. Kingsbury, October 28, 1930. Each metal workingunit includes not only the spindle 6 and the working tool 7, but afeeding means which advances and retracts the tool spindle. There isalso a motor mounted in said unit for independently operating thespindle and feeding means. This metal working unit also includes afriction clutch between the motor and the 'feeding mechanism and anautomatic control means whereby the feeding of the spindle is started orset into operation and after the feed has completed a cycle and thespindle is retracted, the fed is automatically stopped. 'This feedingmechanism and the starting and' stopping mechanism therefor is alldisclosed in detail in the patent referred to and further descriptionthereof is not thought necessary. These metal working units as embodiedin the present vmachine are separately and independently mounted on thebed or frame F kand disposed in a predetermined fixed position relativeto the work supporting turret as indicated in Figure 1 of the drawings.

Attached to each metal working unit is a supporting bracket 8 on whichis mounted a control cylinder 9. Attached to this control cylinder der 9operates the plunger which engages the arm 11 on the control shaft 12which initiates the operation ofthe 'feeding mechanism for thev drillspindle. The initiating of the feeding mechanism of the metal workingunit is accomplished by withdrawing the block from the path of travel ofthe stop on the control cam for feeding the spindle. When the cylinder 9is cut off from the fluid supply, vand opened to the atmosphere, thenthe spring will shift the block into the path of travel of the stop, andthis will automatically stop the feed of the metal working units. Eachmetal working unit, therefore, completes a cycle of movement and is thenautomatically stopped. All of the metal working units are similar inconstruction and each is provided with its own uid controlled startingmechanism.

The indexing turret or table 1 (see Figs. 6 and 7) includes a centershaft 13 to which the'turret 1 is attached. It is understood that thisturret l is provided with a hub 1a and thatdifferent types of workholders may be mounted on this turret. 'I'he shaft 13 is mounted in asuitable supporting bearing 14 carried by the support 15 which is inturn mounted on the frame of the machine. Beneath the turret 1 is ahousing 16 in which the actuating mechanism for the turret is placed.VThe lower end of the shaft 13 is mounted in a ball bearingV 17 carriedby the housing 16. Attached to the shaft 13 is a disc 18 provided with aseries of radial slots 19. These radial slots are spaced for position ina predetermined angular relation to each other. There is an annularrecess in the under face of the disc at the inner end of these radialslots so that the radial slots extend from the periphery of the disc 18to this annular recess 20 which is preferably of slightly greater depththan the radial slots.

Mounted in the housing 16 is a shaft 21. The shaft 21 carries a disc 22at its upper end on which is mounted a crank pin 23 carrying a roller24. As the shaft 2l rotates this roller 24 will enter the radial groove19a (see Fig. 6) and will cause said disc and turret to rotate in thedirection of the arrow until the slot reaches the position 19h when theroller passes out of the slot. The roller then moves in the annularrecess and leaves all control of the disc until it enters the nextradial slot. Also mounted onthis shaft 21 is a locking cam 25. Thislocking cam 25 operates upon a roller 26 attached to a lever 27pivotally mounted on a stub shaft 28 which in turn is fixed to a bearing29 formed in the part of the housing 16. This lever 27 has a forked end30l which straddles a lug 31 projecting from a locking bolt 32. 'I'helocking bolt 32 isjmounted to slide vertically in suitable bearings 33,33. The disc 18 is provided witha series of bushings 34 adapted toreceive the upper rounded end 35 of the'locking bolt 32. A spring 36surrounds a rod 37 which bears against'an abutment arm 39 carried by thelever 27. The other end of the spring bears against the housing and therod passes freely through the housing. The spring bears against ashoulder on the rod adjacent the arm 39 and normally tends to swing thelever 27 in a clockwise direction so as to hold the roller 26 inengagement with the cam face 25. This cam is so constructed and timedthat when the roller 24 moves out of Iche radial slot so as to releasecontrol of the disc 18 and the indexing turret attached thereto thelever will be oscillated and the locking bolt 32 projected into lockingengagement with the disc`18.

' This provides a mechanism whereby the disc 18 will be rotatedpositively at intervals and after it has passed through a certainangular range of motion it will come to a stop and be locked and held inthis position until the 'next operation of the roller thereon. The cam,of course, releases the bolt at the time that the roller takes up thedisc for rotating the same. This provides an intermittent rotatingturret which will position the material first at one operating stationand then turret as to operate upon the material while the turret is at astandstill.

On the rotating disc 22 is an inserted hardened cam plate 40. This camplate is provided with a high point 41. As the disc 22 rotates this highpoint of the hardened plate comes into contact with a rod 42 which isthe stem of an air control valve. This air control valve is of the usualconstruction and includes a valve casing 43 which is attached to thehousing 16. The rod 42 is pressed by a spring in a direction toward theindexing turret so that when the control cam on the indexing turretreleases the stem, the valve will close. The valve stem has an opening42a therein which leads to the atmosphere, and when the .Valve seats andcloses, this opening is outside of the casing of the valve and isuncovered and it will vent the pipe lines leading to each metal workingunit in the usual manner of fluid pressure control valves. The cam, asnoted, has a high point 4l, and this high point is timed so that thevalve is opened to start the metal working units after the turret comesto a stop, but it releases the valve so as to shut off the fluid supplybefore the cam comes to a stop. A pressure .pipe 44 leads to the tripsfor the metal working units as will be more fully disclosed, and apressure pipe 45 leads from this valve casing to the supply. The purposeof this valve is to open this supply pipe so that the fluid pressurewill be released for starting or setting into operation the metalworking'units. It is essential that the metal working units shall berestrained -from operation until the indexing turret has come to astandstill and the material properly positioned for the metal workingunits to operate thereon. The valve when it closes cuts off the uidsupply to the control cylinders 9 at the metal Working units, releasingthe fluid pressure on said cylinders so as to permit the automaticstopping of the metal working units when the feed cycle has beencompleted.

The shaft 21 which operates the indexing turret is in turn operated by amotor actuating mechanism. This motor actuating mechanism is shown indetail in Figs. 3, 4 and 5. Said mechanism includes a motor M whichactuates a shaft 46. On said shaft 46 is a gear Wheel 47 which mesheswith a gear wheel 48 on a countershaft 49. The countershaft 49 carries afriction clutch sleeve 50 which cooperates with a friction clutch member51. The friction clutch member 51 is carried by a shaft 52 which isjournaled in a bearing 53 carried by a movable sleeve 54. A spring 55bears against the sleeve at one end and against an adjustable abutment56 at the other end and normally moves the shaft section 52 so as tobring the friction clutch members into engagement. On this shaft section52 is a spiral gear 57. The spiral gear 57 meshes with a worm gear 58attached to a vertical shaft 59 which is connected to the shaft 21 by auniversal joint connection 60. It will thus be seen that as the motorturns the main shaft this spiral gear 57 will be rotated as long as thefriction clutch members are in engagement and will impart rotation tothis shaft 21. If the shaft 2l is stopped by means of the turretstriking an obstruction, then the spiral gear will travel on the worm soas to unseat the friction clutch. This stops the rotation of the shaft21 until the obstruction is removed so that the turret can move forward.This provides a means wherby the turret is driven by a motor actuatingmechanism and whereby in case of stoppage the actuating mechanism forthe turret is disconnected.

Mounted on the shaft 59 is a hub 61 carrying a stop lug 62. A stop lever63 is pivoted at 64 to the casing in which the shaft 59 is mounted andthis stop lever carries a hardened stop block 65. When thelever is inthe position shown in Fig. 3 the stop block 62 on the hub contacts withthe stop block on the stop lever and the parts will be held fromrotation. When the stop lever is holding the shaft 59 from rotation thenthe spiral gear 57 will travel on the Worm and disconnect the frictionclutch members. The motor is not stopped but the shaft 59 is stoppedand, therefore, the actuating mechanism comes to rest. When the stoplever is withdrawn from the path of rotationof the stop block 62, thenthe shaft 59 will-make one rotation and if the stop lever is againpressed so that the block on the rotating part engages the block on thestop lever, then the shaft will again be stopped.

In other words, the shaft makes one complete rotation and then 'stopsThis is the cycle of operation of the indexing mechanism. The parts areso timed that when the roller on the disc 22 has completed its rotationof the indexing device and hasl moved out of one of the radial slotssaid roller will, therefore, remain at rest in the annular recess, thusgiving the operating units time to perform their operations before theindexing device is again set into operation to move the material to thenext operating station. The cam 40 as already noted, has a high pointwhich engages the stem of the air-controlled valve for opening the same,as soon as the high point passes, the valve closes. 'This isaccomplished before the rotating shaft carrying the disk 22 comes to astop, although the turret ceased its movement when the roller left theradial recess. The metal Working units are, therefore, disconnected fromthe air pressure and can stop after completing a cycle of operation inthe manner which has been described above.

The stop lever 63 is connected by means of a link 66 with a piston rod67 associated with a fluid pressure cylinder 68. On said rod is a piston69. When fluid under pressure is admitted to the end 70 of the cylinder68 the piston 69 is moved downwardly as viewed in Fig. 3 and this Willmove the stop lever 63 so as to withdraw the block 65 from the path ofmovement of the blocks 62 and permit the shaft 59 to rotate.

Associated with this control mechanism is a pressure releasing devicewhich includes a lever 71 pivoted at 72 to a suitable bracket carried bythe frame of the machine. This releasing lever 71 overlies the rotatinghub 61. The block 62 as it rotates engages this releasing lever andswings the same in a counterclockwise direction causing the lever topress on a valve rod 73 which operates on a valve in acasing 74 torelease the cylinder 68 from the fluid pressure. Thus it is that afterthe shaft 59 is set into operation it operates automatically to releasethe fluid pressure from the piston 69 and the spring 74a will move thepiston in the cylinder and position the stop lever so that the block 62will engage the block 65 when the shaft has completed its rotation.

The remainder of the control mechanism for the metal working units andthe motor driven actuating mechanism will now be described. The pressurepipe 44 extends to a common distributing chamber 76. The pipe 10 leadsfrom this LUU common supply chamber 76 to the cylinder 9 which has beendescribed above. There is a pipe 10 leading to the control cylinder vfortheI metal Working unit 4, a pipe 10a which leads to the cylinder 9a forthe metal working unit 3, and

, a pipe 10b which leads to the cylinder 9b for the metal working unit2. A pipe 77 leads from the supply pipe 45 to a valve casing 78associated with the metal working unit 2. The pipe passes from thisvalve casing and is connected with a similar valve casing 78a associatedwith the metal working unit 3. It passes from this valve casing to thevalve casing 78h associated with the metal working unit 4. It passesfrom this valve casing 78h to a valve casing 79. The valve in the valvecasing 79 is controlled by a hand lever 80. The pipe 77 passes. fromthis valve casing 79 to the cylinder 68.

Associated with the valve casing 78 is a valve which is operated by thereturn of the spindle of the metal working unit to its retracted idleposition. Attached to the spindle is a projecting arm 8l. This arm 8lengages a projecting valve stem and opens the valve so that the valve inthe valve f casing 78 is opened allowing afree passage of the fluidpressure through the pipe. .There is a similar valve associated witheach unit and the pipe 77 leads through all of these valves in series tothe hand controlled valve 80. Therefore, no uid can be passed throughthe pipe 77from the supply to the hand controlled valve 89 except whenthe spindles of each metal Working unit are retracted and in idleposition. After the material to be operated upon has been properlyplaced in the work holders on the turret the operator depresses thevalve 80 and allows the pressure fluid flowing through the pipe 77 topass to the cylinder 68 and this will operate to move the stop lever soas tc release the shaft 59 and the shaft 59 will rotate through onecycle of rotation. The machine is usually provided with an idle stationfor the positioning of the material in thework holder on the turret andafter it is positioned then this rotation of the turret through thereleasing of the valve 80 will carry the material to the first operatingstation where the metal working unit performs its operation thereon.After the shaft 59 is released the turret is rotated by the rotation ofthe shaft 21. The roller on the disc 18 when set into motion passes intooneof the radial slots. The rotation of the shaft also releases theturret and it is ,turned through one step movement or cycle and thematerial positioned as stated above. When the turret has completed thislstep movement then the roller passes out of the radial slot; the turretis locked and at this time the shaft 59 has completed its rotation; thestop lever has been returned to operative position so as to stop theshaft 59. At the same time the turret comes to its proper position forpresenting the material to the metal working-units. The cam 40 on thedisc 22 releases the control valve in the supply pipe so that fluidpressure is supplied to the distributing head 76 and through the pipe 10to the control valves at each metal working unit. Thus it is that themetal working units are started or set into operation. The high point 41on the cam 40 passes the stem f the valve 43 so as to release thevalve'before the disc 22 carrying the cam comes to a stop. This alsoreleases the pressure on the-control cylinders at the metal workingunits so that each metal working unit after -it completes its cycle willautomatically stop.

The spindle moves forward and the tools perform 'their operation uponthe material after which .each unit comprises a tool spindle and afeeding or'translating means for advancing and retract- 90 ing thespindle and also a control means for starting the feeding movement ofthe spindle and automatically stopping the feeding means at the end ofthe feed cycle when the tool is retracted. The machine also includes awork supporting turret which is intermittently rotated for presentingthe material operated upon in succession to these metal working unitsand control means for starting the turret, and for automaticallystopping the same in predetermined set positions. in addition to thecontrol means for the turret and the control means for each metalworking unit, there is a control mechanism including flexible elements;that is, the pipes which interconnect the starting means for the metalworking units with the rotating means for the turret so that themovement of the means which rotates the turret will control the startingof the metal working units, and this control mechanism is of such acharacter that the metal working units will not be started until theturret has properly positioned the material for the operation of thetools thereon. This control mechanism also includes flexible elementsinterconnecting the starting means for the turret with the metal Workingunits, so that the control mechanism only initiates the operation of theturrets when all of the metal working units have completed their feedcycles and the tool spindles thereof are retracted.

`Through the use of these self-contained metal 120 working units and theflexible interconnecting means the metal working units may be placed asdesired, so long as they are within the range of the material foroperation thereon.

It'is obvious that minor changes in the details 125 of construction andthe arrangement of the parts may be made without departing from thespirit of the invention as set forth-in the appended claims.

Having fully described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. An indexing and control mechanism for a metal working machineincluding a series of metal working units, a rotatable turret forpresenting the material operated upon in succession to the workingunits, means for rotating said turret intermittently including avertical shaft, an actuating motor, a sectional shaft operated by themotor carrying a spiral gear meshing with a worm gear on said verticalshaft, said sectional shaft being connected by friction clutch members,spring means for moving the shaft section carrying the spiral gear so asto cause said clutch members to engage with each other, a stop mechanismfor stopping said vertical shaft when it has made one complete rotation,fluid pressure 'means controlled by the metal working units forreleasing the stop mechanism so as to permit the shaft to rotate and theturret to be stop mechanism completed its cycle of operation,

turned from one set position to another set position after all of themetal working units have completed their operation.

2. `An indexing and control mechanism for a metal working machineincluding a series of metal working units, a rotatable turret forpresenting the material operated upon in succession to the workingunits, means for rotating said turret intermittently including avertical shaft, an actuating motor, a sectional shaft operated by themotor carrying a spiral gear meshing with a worm gear on said verticalshaft, said sectional shaft being connected by friction clutch members,spring means for moving the shaft section carrying the spiral gear so asto cause said clutch members to engage with each other, a stop mechanismfor stopping said vertical shaft when it has made one complete rotation,fluid pressure means controlled by the metal working units for releasingthe stop mechanism so as to permit the shaft to rotate and the turretVto be turned from one set position to another set of the metal workingunits have lcompleted their operation, said stop mechanism having meansfor releasing the fiuid pressure during the cycle of rotation of thevertical shaft whereby said stop mechanism may become effective to stopthe shaft upon completion of its rotation.

3. A metal Working machine comprising in combination a series ofself-contained motor operated metal working units each including astarting and automatic stopping mechanism for stopping the unit aftereach feed cycle, a work supporting turret for presenting the materialoperated upon in succession to the working units, a motor operatedindexing mechanism for intermittently rotating said turret including adriving shaft, a driven shaft, friction clutch members between saidshafts, an actuated shaft operated by said driven shaft for turning saidturret from Vone fixed set position to another fixed set position, alocking means for holding the turret ina set position controlled by saidactuated shaft, a

for separating the clutch members and stopping the driven shaft, meanscontrolled by the metal working units for releasing the stop mechanismand starting the indexing mechanism after each metal working unit hasand means operated by the indexing mechanism for starting the metalworking units after the indexing mechanism has completed its cycle ofoperation.

4. A metal working machine comprising in combination a supporting frame,a series of selfcontained independently operable metal working unitsseparately mounted on said frame, each unit comprising a rotary andtranslatable tool spindle, feeding means for advancing and retractingsaid spindle, a power' operable means in said working unit forindependently operating the spindle and feeding means, and a controlmeans for starting and for automatically stopping the feeding means atthe end of a feed cycle when the tool is retracted, a work supportingturret mounted on said frame, means for intermittently rotating saidturret for presenting the material operated upon in succession lto themetal working units, a. control means for starting and for automaticallystopping the turret in predetermined set positions, and a controlmechanism including flexible elements inter-connecting the startingmeans for the metal working units with the rotating means for the turretand the starting means for the turret with the to simulthe metal metalworking units and operating taneously initiate the operation of workingunits as the turret completes its movement to set position and operatingto initiate the operation of the turret when all the metal working unitshave completed their feed cycle and the tool spindles thereof areretracted.

5. A metal working machine comprising in combination aY supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame', each unit comprising a toolspindle, feeding means for advancing and retracting said spindle, meansfor starting and automatically stopping the feed of the spindle when thetool is retracted, a work supporting turret mounted on said frame, meansfor intermittently rotating said turret for presenting the materialoperated upon in succession to the metal working units includingfriction clutch members, a control means for automatically stopping theturret and separating said friction clutch members, a starting means forreleasing the turret and for closing said clutch members, a-controlmechanism including flexible elements inter-connecting the startingmeans for the metal working units with the rotating means for the turretand the starting means for the turret with the metal working units andoperating to s' ultaneously initiate the operation of the metal workingunits as the turret completes itsmovement to a set position, andoperating to initiate the operation of the turret when all themetalworking units have completed their feed cycle and the tool spindlesthereof are retracted.

- 6. A metal working machine comprising in combination a supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame, each unit comprising a rotaryand translatable spindle, power operable means for independentlyrotating and translating said spindle, means controlled by thetranslating means of each unit for stopping said translating means onthe completion of a work cycle, and a fluid pressure control meansassociated with each metal working unit for starting the new work cycle,a work supporting turret mounted on said frame, means for intermittentlyrotating said turret for presenting the material operated upon insuccession to the metal working units, fluid pressure control meansfor-starting 'and for automatically stopping the turret in predeterminedset positions, a fluid pressureline connected to the control means ofeach unit, a valve in said line and means operable by the turretrotating means for opening the valve as the turret completes itsmovement to a set position for releasing a fluid pressure forsimultaneously initiating the operation of the. metal working units, afluid pressure line connected to the starting means for the turret, avalve in said line at each metal working unit operated by the feedspindle for releasing a fluid pressure when all of the valves at themetalworking units are open for initiating the operation of the turret.

7. In a metal working machine in combination with a bed, a tablerotatable thereon, and a plurality of tools arranged in spaced relationfor successive operation upon a piece of Work and positioned adjacentthereto, holders arranged in spaced relation upon said table andvsimilarly spaced for simultaneously presenting a plurality of likepieces of work to said tools for simultaneous operation upon sepaplurality of work l arate pieces of work and successive operation uponthe same piece of work, independent power operable means for each toolfor continuously rotating the same and intermittently reciprocating thesame toward and away from the pieces of work, each power operable meansbeing arranged for single cycle automatic operation, and a single meansfor simultaneously initiating the reciprocation of-each of saidtools.`

8. In a metal working machine in combination with a bed, a tablerotatable thereon, and a plurality of tools arranged in spaced relationfor successive operation upon a piece of work and positioned adjacentthereto, a plurality of work holders arranged in spaced relation uponsaid table and similarly spaced for simultaneously presenting aplurality of like pieces of work to said tools for simultaneousoperation upon separate pieces of work and a successive operation uponthe same piece of work, independent power operable means for each toolfor continuously rotating the same and intermittently reciprocating thesame toward and away from the pieces of work, each power operable meansbeing arranged for single cycle automatic operation, a reciprocationmovement starting control, and means remotely operable and operativelyassociated with each starting control for simultaneously and remotelyinitiating the reciprocation of each of said tools.

9. In a metal working machine in combination withv a bed, a tablerotatable thereon, and a plurality of tools arranged in spacedrelationfor successive operation upon a piece of work and positioned adjacentthereto, a plurality of work holders arranged in spaced relation uponsaid table and similarly spaced for simultaneous- Lv presenting aplurality of like pieces of work to said tools for simultaneousoperation upon separate pieces of work and successive operation upon thesame piece of work, independent power operable means for each tool forcontinuously rotating the same and intermittently reciprocating the sametoward and away from the pieces of work, each power operable means beingarranged for single cycle automatic operation, and a single means forsimultaneously initiating the reciprocation movement of each of saidtools, said single means including a manually operable control memberadjacent the loading and unloading station of said machine.

10. In avmetal working machine in combination with a bed, a tablerotatable therein, and a plurality of tools arranged in spaced relation-for successive operation upon a piece of work and positioned adjacentthereto, a plurality of work holders arranged in spaced relation uponsaid table and similarly spaced for simultaneously presenting aplurality of like pieces of work to said tools for simultaneousoperation upon separate pieces of work and successive operation upon thesame piece of work, independent power operable means for eachV tool forcontinuously rotating the same and intermittently reciprocating the sametoward and away from the pieces of work, each power operable means beingarranged for single cycle automatic operation, each power operable meansincluding a starting control, and means remotely operable andoperatively associated with each starting control for simultaneously andremotely initiating the reciprocation of each of said tools, said singlemeans including a manually operable control member adjacent the loadingand unloading station of said machine.

11. A metal working machine comprising in combination a supportingframe, a turret rotatable thereon, a plurality oi' self-containedindependently operable metal working units separately mounted on saidframe, each unit comprising a rotaryand translatable tool spindle,feeding means for advancing and retracting said spindle, power operablemeans for independently rotating and feeding said spindle, said metalworking units being arranged in spaced relation for successive operationupon a piece of work and positioned adjacent thereto, a plurality ofwork holders arranged in spaced relation upon said turret and similarlyspaced for simultaneously presenting a plurality of like pieces of workto said tool spinvdles for simultaneous operation upon separate piecesof work and successive operation upon the same piece of work, meanscontrolled by the feeding means for stopping the feed automatically whensaid spindle is fully retracted, means associated with each metalworking unit for starting the feed thereof, means independent of saidmetal working units for rotating said turret and a single control meansfor simultaneously initiating the feeding means of the metal workingunits.

12. A metal working machine comprising in combination, a supportingframe, a turret rotatable thereon, a plurality of self-containedindependently operable metal working units separately mounted on saidframe, each unit comprising a rotary and axially movable tool spindle,feeding means for advancing and retracting said spindle, power operablemeans for rotating and feeding said spindle, said metal working unitsbeing arranged in spaced relation for successive operation upon a pieceof work'and positioned adjacent thereto, a plurality of work holdersarranged in spaced relation upon said turret and similarly spaced forsimultaneously presenting a plurality of like pieces of work to saidtool spindle for simultaneous'operation upon separatepieces of work andsuccessive operation upon the same piece of work, means controlled bythe feeding means for stopping the feed automatically at the end of eachcycle of operation, means associated with each metal working unit forvstarting the feed thereof, means independent of said metal working unitsfor rotating said turret and a single control means operated from saidturret rotating means for simultaneously initiating the feeding meansfor the metal working units, said control means including flexibleelements interconnecting the starting means of the metal working unitsand the single control means.

13. A metal working machine comprising in combination, a supportingframe, a turret rotatable thereon, a plurality of self-containedindependently operable metal working units separately mounted on saidframe, each unit comprising a rotary and axially movable tool spindle,feeding means for advancing and retracting said spindle, a motor foroperating the spindle and feeding means, said metal working units beingarranged in spaced relation for successive operation upon a piece ofwork and positioned adjacent thereto, a plurality of work holdersarranged in spaced relation upon said turret and similarly spaced forsimultaneously presenting a plurality of like pieces of Work to saidtool spindles for simultaneous operation upon the same piece of work,means controlled by the feeding means for stopping the feedautomatically at the end of each cycle of operation, means associatedwith each metal working unit for starting the feed thereof, means forrotating said turret to -ranged in spaced relation upon said turret rnism for a metal set positions and means controlled by said rotatladjacent thereto, a plurality of work ho'ders ar.

ranged in spaced relation upon said turret and similarly spaced forsimultaneously presenting a plurality of like pieces of work to saidtools for simultaneous operation upon separate piecesof work andsuccessive operation upon the same piece of work, independent poweroperable means for each tool for continuously rotating the same, andintermittently feeding the same toward and away from the pieces of work,means controlled by each power operable feeding means for-stopping thefeed automatically at the end of each cycle of operation, meansassociated with each tool for starting the feed thereof, including acontrol cylinder, a plunger therein adapted to start the feed of thetool when operated, a control valve, a source of fluid pressureconnected thereto, and a pipe extending from said control valve to cachcylinder whereby fluid pressure may be simultaneous`y admitted to all ofsaid cylinders for starting the feed of the tools.

15. A metal working machine comprising in combination, a supportingframe, a Work supporting turret rotatable thereon, a plurality of toolsarranged in spaced relation for successive operation upon a piece ofwork and positioned adjacent thereto, a plurality of work holders arandsimilarly spaced for simultaneously presenting a plura ity of likepieces of work to said tools for simultaneous operation upon separatepieces of work and successive operation upon the same piece of work,independent power operable means for each tool for continuously rotatingthe same, and intermittently feeding the same toward and away from thepieces of Work, a spring-positioned trip lever associated with eachmetal working unit for automatically stopping the feeding means when thespindle is fully retracted, and a fluid pressure control means forsimultaneously moving said trip levers of the metal working units forinitiating the feeding means.

16. An automatic indexing and control mechanism for a metal Workingmachine including a series of metal working units, a rotatable turretfor presenting the material operated upon in succession to the workingunits, means for rotating said turret intermittently, including anoperating shaft, a crank carried thereby, an indexing disk having radialslots into and out of which the crank passes for moving the turret, aworm gear for driving said operating shaft, a spiral gear meshing withsaid worm gear, a shaft section carrying the spiral gear, a drivingshaft section in alinement with the shaft section carrying the spiralgear, clutch members interposed between said shaft sections, a springfor moving said shaft section carrying the spiral gear endwise forclos-- ing the clutch members, and an adjustable abutment member bearingon said spring whereby the tension on the spring may be varied.

17. An automatic indexing and control mechaworking machine including aseries of metal working units, a rotatable turret for presenting thematerial operated upon in succession to the working units, means forrotating said' turret intermittently, including an operating shaft, acrank carried thereby, an indexing disk having radial slots into and outof'which the crank passes for moving the turret, a worm gear for drivingsaid operating shaft, a spiral gear meshing with said worm gear, a shaftsection carrying the spiral gear, a 'driving shaft section in alinementwith the shaft section carrying the spiral gear, c'utch membersinterposed between said shaft sections, a spring for moving said shaftsection carrying the spiral gear endwise for closing the clutch members,an adjustable abutment member bearing on said spring whereby the tensionon the spring may be varied, a stop member moving with said shaftoperating the turret, and a control member adapted to move into the pathof the stop member for stopping the same when said operating shaft fromthe turret has completed one revolution, said spiral gear operating tomove the shaft section on which it is mounted endwise upon the stoppingof said operating shaft so as to separate the clutch members until saidcontrol member is released.

18. A metal working machine comprising in combination, a supportingframe, a series of selfcontained independently operab'e metal workingunits separately mounted on said frame, each unit comprising a rotaryand translatable tool spindle, feeding means for advancing andretracting said spindle, power operable in said working unit forindependently rotating the spindle and operating the feeding means, acontrol means for starting and automatically stopping the feeding meansat the end of a feed cycle when a tool is retracted, a work supportingturret mounted on said frame, means for intermittently rotating saidturret for presenting the material to be operated upon in succession tothe metal working units, a control means for starting and forautomatically stopping the turret in predetermined set positions, and asingle means for starting all of the metal working units effective onlywhen said indexing turret is in a set position, said single meansconsisting of flexible elements.

19. A metal working machine comprising in combination a supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame, each unit comprising a rotaryand translatable tool spindle, feeding means for advancing andretracting said spindle, power operable means in said working unit forindependently rotating the spindle and operating the feeding means, acontrol means for starting and automatically stopping the feeding meansat the end of a feed cycle when a tool is retracted, a work supportingturret mounted on said frame, a continuously operating motor, meansoperated thereby for intermittently rotating said turret for presentingthe material to be operated upon in succession to the metal workingunits, a control means for starting and automatically stopping theturret in predetermined set positions without stopping the motor, and asingle means for starting all of the metal Working units effective onlywhen said turret is in a set position, said single means consisting offlexible elements.

20. A metal working machine comprising in combination, a supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame, each unit comprising a rotaryand translatable tool 150 turret is in a set spindle, feeding means foradvancing and retracting said spindle, power operable means in saidworkingamit for-independently rotating the spindle and operating thefeeding means, a control means for starting and automatically stoppingthe feeding means at the end of a feed cycle when a tool is retracted, awork supporting turret mounted on said frame, means for in. termittentlyrotating said turret for presenting the material operated-upon insuccession to'the metal workingunits, including friction clutch members,means for automatically separating said clutch members in case theturret strikes an obstruction, and for automatically restoring theconnection oi the clutch members when the obstruction is removed, andmeans for separating said clutch-members for stopping the turret in apredetermined set position.

21. A metal working machine comprising in combination, a supportingframe, a series of selfcontained Vindependently operable Ymetal workingunits separately mounted on said frame, each unit comprising a rotaryYand translatable tool spindle, feeding meansl for advancing .andretracting said spindle, power operable means in said working unit forindependently rotating the spindle and operating therfeeding means, acontrol means for starting and automatically stopping the feeding meansat the end of a feed cycle when a tool is retracted, a work supportingturret mounted on said frame, means for intermittently rotating Vsaidturret for presenting the material operated upon in succession to themetal working units, including friction clutch members, means forautomatically separating said clutch members in case the turret strikesan obstruction and for automatically restoring the connection of theclutch members when the obstruction is removed, means for separatingsaid clutch members for stopping the turret in a predetermined setposition, and a single means for starting all of the metal working unitswhen the position, said single means consisting of flexible elements. s22. A metal working machine comprising in combination, asupportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame, each unit comprising a rotaryand translatable tool spindle, feeding means for advancing andretracting said spindle, power operable means in said working unit forindependently rotating the spindle and operating the feeding means, a.control means for starting and automatically stoppingthe feeding meansat the end of a feed cycle when a tool is retracted, a work supportingturret-mounted on saidnframe, means for intermittently rotating saidturret for presenting the material operated upon in succession to themetal working units, including friction clutch members, means forautomatically separating said clutch members in case the turret strikesanbstruction, and for automatically restoring the connection of theclutch members when the vobstruction is removed, means for separatingsaid clutch members for stopping the turret in a predetermined setposition, andmeans operated by said turret positioning -means forstarting all of the metal working units when said turret is in ailxecLposition. e

23. A metal working machine comprising in combination, a supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame, each unit comprising a rotaryand translatable tool spindle,

feeding means for advancing and retracting said spindle, power operablemeans in said working unit for independently operating the spindlerotating and feeding means, and a control means for starting andstopping the feeding means atl the end of a feed cycle when the tool isretracted, a work conveyor mounted on said frame, means forintermittently feeding said conveyor for presenting the materialoperated upon in succession to the metal working units, a control meansfor.`

starting and for automatically stopping the conveyor in predeterminedset positions and a control mechanism including flexible elementsinterconnecting the starting means for the metal working units with thefeeding means for the conveyorand the starting means for the conveyorwith the Vmetal workingrrunits and operating to simultaneously initiatethe operation of the metal working Vunits as the conveyor completes itsmovement to a set position, and operating to initiate the operation ofthe conveyor when the metal working units have completed their feedcycles and the tool spindles thereof are retracted. Y

24. A metal working machine comprising in combination, a supportingframe, a series of self- 1 contained independently operable metalworkingunits, each comprising a tool spindle, feeding means for advancing andretracting said spindle, meansfor starting and automatically stoppingthe feed of the spindle when the tool is retracted, 1 a work supportingturret mounted on said frame, means for intermittently rotating saidturret, a control means for starting and for automatically stopping theturret in predetermined set positions, and means operated by saidrotating means 1 for locking the -turret in a set position, and acontrol mechanism including flexible elements interconnecting thestarting means for the metal working units with the rotating means forthe turret the metal working units and operating to simultaneouslyinitiate the operation of the metal working units as the-turretcompletes its movement to a set position and operating to initiate theoperation of the turret when all of the metal working units havecompleted their feed cycles and the tool lspindles thereof areretracted.

25. A metal working machine comprising in combination, a supportingframe,V a series of cyclically operating work units, each having a 1 aself-contained power operating mechanism, means for stopping saidoperating mechanism on the completion of a cycle of operation, means foreffecting the starting of a newY cycle, a work supporting turret mountedon said frame, inde- 1 pendent power operable means for intermittentlyrotating said turret for presenting the material operated upon insuccession to the work units, a control means for starting and forautomatically stopping the turret in predetermned set posil tions, and acontrol mechanism interconnecting the starting means for the work unitswith the rotating means for the turret and the starting means for theturret with the work units and operating to simultaneously initiate theoperation of the work units as the turret completes its movement to aset position and operating to initiate the operation of the turret Ywhenall of the work units have completed their cycles of operar tion. l

26. A metal working machine including a frame, a self-contained metalworking unit adapti ed to be mounted in any position on said frame;

YYsaid unit comprising a rotary and translatable 1 and the startingmeansV for the turret with i lo " -unit 4for releasing.

spindle; a motor mounted in said working unit for` rotating andtranslating said spindle, means controlled by the translating means ofeach unit for stopping said translating means on the completion of awork cycle, and'means associated with'said working unit for starting anew work cycle, -a-work supporting turret mounted on said frame, .aconstantly revolving .motor for intermittently rotating said turret forpresenting the material operated upon' to said metal working unit, acontrol means for starting and for auto-v matically stopping the turretin predetermined set-positions and a control mechanism includingflexible elements interconnectingthe starting means for the metalworking unit with the rotating vmeans for the turret and the startingmeans for the turret with the metal working unit and operating toinitiate the operation of the metal working unit as the turret completesits movement to a set position, and operating to initiate the operationof the turret when the metal working unit has. completed its feed cycle.

27. A metal working machine comprising in combination, a supportingframe, contained cyclically. operating work units each having aself-contained power operating mechanism, means for stopping theoperation on the completion of a cycle, and a control means foreffecting the start of a new cycle, a work supporting turret mounted onsaid frame, means for intermittently rotating said turret for presentingthematerial operated upon in succession to the work units, fluidpressure control means for starting and for automatically stopping'theturret in predetermined set positions, a fluid pressure line connectedto the control means of each unit, a valve in said line and meansoperable by the turret rotating means for opening the valve as theturret completes its movement to a set position for for simultaneouslyinitiating the operation'of the work units, a fluid pressure lineconnected to the starting means for the turret, a valve in said line ateach work unit opened by the operating mechanism of eachwork a uidpressure when all of the valves at the work units are opened forinitiating the operation of. the turret. 28. A metal working machinecomprising in combination a supporting frame, a series of selfcontained,independently operable metal work- `ing units, eachunit comprising atool spindle, 'feeding means for advancing and retracting said spindle,means for starting and automatically stopping the feed of the spindlewhen the tool is retracted, a work .supporting turret, indexing meansfor automatically turning and stopping saidl turret in a predeterminedposition, means controlled by said indexing means for locking the turretin said set position while the tools are op erating on the -work,manually controlled means .for initiating the operation of the indexingmechanism and means'controlled by each metal working unit for renderingsaid manually controlled -means inoperative except when the tools of themetal working units are retracted.

. 29. A metal working machine comprising in 'combination, a supportingfram a series of selfcontained independently operable metal workingspindle, feed- -ing means for advancing and retracting said spindle,means for starting and for automatically stopping the feed of thespindle when the tool is zretracted, a work supporting turret, means for-rotatingsaid turret to set positions and means controlled by saidrotating means for locking the of the spindle whenthe a series of self--lself-contained lworking units separately mounted on said frame,

' operable means turret in a set position while the tools are operatingon the work, and means interconnecting each metal working unit with therotating means for the turret for rendering said rotating meansinoperative except when the tools of the metal working units areretracted.

30. A metal working machine comprising inv combination, a supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on said frame, each unit comprising a toolspindle, feeding means for advancing and retracting said spindle, meansfor starting and for automatically stopping the feed tool is retracted,a control means associated with each metal working unit and renderedoperative when said spindle is fully retracted, a turret rotatable toset positions, means for locking the turret in a set position, mechanismfor controlling the locking means, and flexible means' interconnectingsaid mechanism with the control means at each metal working unit wherebysaid mechanism can be operated to unlock the turret only v4when thetools of the metal working units are retracted.

31. A metal working machine comprising in combination, a supportingframe, a series of selfcontained independently operable metal workingunits separately mounted on 'said frame, each 'unit comprising a toolspindle, feeding means for advancing and retracting said spindle, meansfor starting and for automatically stopping the feed of the spindle whenthe tool is retracted, a work supporting turret, means for rotating saidturret to set positions, a control means for starting and forautomatically stopping the turret in the "set positions, flexible meansinterconnecting each metal working unit with the starting means for theturret for initiating the rotation of the turret when all of the toolspindles are retracted, and a control means for simultaneouslyinitiating the feeding means of the metal working units at apredetermined time after the initiation of the turret rotating means andafter said turret has been brought to a set position.

32. A metal working machine comprising in combination, a supportingframe, a plurality of independently operable metal each .unit comprisinga rotary and translatable spindle, feeding means for advancing andretracting said spindle, power operable means for rotating and feedingsaid spindle, means controlled by the feeding means of each unit forstopping said feeding means on the completion of a work cycle, and meansassociated with each metal working unit for starting a new work cycle, awork supporting turret mounted on said frame, power for rotating saidturret to set positions and means controlled by said rotating means forlocking the turret in a set position while said metal working units areoperating on the work, and a single control means operated from saidturret rotating means for simultaneously operating the starting meansfor each metal working unit after said turret is rotated to a setposition.

33. A metal working machine comprising in combination, a supportingframe, a. plurality of self-contained independently operable metalworking units separately mounted on said frame,

.each unit comprising a rotary and translatable spindle, feeding meansfor advancing and retracting said spindle, power operable means forrotat- -ing and feeding said spindle, means controlled by the feedingmeans of each unit for stopping said feeding means on the completion ofa work cycle, and means associated with each metal working unit forstarting a new work cycle, a work supporting turret mounted on saidframe, power a operable means for rotating said turret to set positionsand means controlled by said rotating means for locking the turret in aset position while said metal working units are operating on the work,and a single control means for simultaneously operating thestartingmeans for each metal working unit after said turret is rotatedto a set position.

34. An automatic indexing and control mechamsm for a metal workingmachine including a series of metal working umts, means for starting andfor automatically stopping each metal working unit after a feed cycle, arotatable turret for presenting the material operated upon in successionlto the metalworking units, means for rotating said turretintermittently to set positions including an operating shaft, a crankcarried thereby, an indexing disc having radial slots into and out ofwhich the crank passes for moving the turret, means operable from theshaft for locking said turret in a set position, and means for startingand for automatically stopping said turret in the set positions, and asingle control means operated from said shaft for initiating theoperation of the metal working umts.

3 5. An automatic indexing and control mechamsm for a metal workingmachine including a series of metal working units, means for startingand for automatically stopping each metal working unit after a feedcycle, a rotatable turret for presenting the material operated upon insuccession to the metal working units, means for rotating said turretintermittently, including an operating shaft, a crank carried thereby,an indexing ldisc having radial slots into and out of which the crankpasses for moving the turret, and means for starting and forautomatically stopping said shaft when the turret is in predeterminedset positions, including means associated with each metal working unitand operating to render said starting means inoperative until the metalworking units have completed their feed cycle.

36. A metal working machine including a frame, a rotatable turretmounted on said frame adapted to present material carried thereby todifferent stations for operation thereon by a metal working unit, andmeans for rotating said turret and stopping the same at each stationincluding a power-operated shaft held against axial movement, a drivenshaft in axial alinement therewith, clutch members carried by theadjacent ends of said shafts, yielding means for moving the driven shaftaxially for causing engagement of the clutch members, a drivingconnection between the driven shaft and the turret constructed anddisposed so that the driving torque tends to move said driven shaftaxially for releasing the clutch members, and a stop lever forpreventing rotation of the turret whereupon the driving torque willrelease the driving connection between the clutch members, said yieldingmeans operating upon the release of the stop lever to establish drivingconnection of said clutch members.

37. A metal working machine comprising in combination a series ofself-contained motoroperated metal working umts, each including astarting and automatic stopping mechanism, a work supporting turret forpresenting material to be operated upon in succession to the metalworking units, a motor-operated indexing mechanism for intermittentlyrotating said turret including a driving shaft section held againstaxial movement, a driven shaft section mounted for axial movement,friction slip clutch members carried by the adjacent ends of said shaftsections, yielding means for moving the driven shaft axially for causingengagement of the clutch members, a driving connection between thedriven shaft and the turret constructed and disposed so that the drivingtorque tends to move the driven shaft axially for releasing the clutchmembers, a stop lever for preventing the rotation of the turretwhereupon the driving torque will release the driving connection betweenthe clutch members, said yielding `means operating upon the release ofsaid stop lever to establish driving connection of said clutch members,means controlled by the working units for moving said stop lever torelease the turret for an indexing cycle whenall of the metal workingunits have completed `their cycle of operation, and means controlled bythe turret operating mechanism for releasing said metal working unitsfor operation upon the completion of the cycle of movement of theturret.

38. A metal working machine including a frame, a rotatable turretmounted on said frame adapted to present material carried thereby todifferent stations for operation thereon by a metal working-unit, andmeans for rotating said turret and stopping the same at each stationincluding a power-operated shaft held against axial movement, a drivenshaft in axial alinement therewith, clutch members carried by theadjacent ends of said shafts, yielding means for moving the driven shaftaxially for causing engagement of the clutch members, a spiral gearcarried by said driven shaft, a worm gear meshing with said spiral gear,devices operated by said worm gear for rotating said turret fromonestation to another, -said spiral gear and said worm gear being disposedso that the driving torque tends to move said driven shaft axially forreleasing the clutch members, a stop lever for preventing the rotationof the turret whereupon the driving torque will release the drivingconnection between the clutch members, said yielding means operatingupon the release of the stop lever to establish driving connection ofsaid clutch members, means for moving the stop lever to a releasingposition for initiating the movement of the turret, and means forreturning said stop lever to normal position for stopping the turret atthe end of its feed cycle.

39. A metal working machine including a frame, a rotatable turretmounted on saidframe adapted to present material carried thereby todifferent stations for operation thereon by a metal working unit, andmeans for rotating said turret and stopping the same at each stationincluding a power-operated shaft held against axial movement, a drivenshaft in axial alinement therewith, clutch members carried by theadjacent ends of said shafts, yielding means for moving the driven shaftaxially for causing engagement of the clutch members, a spiral gearcarried by said driven shaft, a worm. gear meshing with said spiralgear, devices operated by said worm gear for rotating said turret fromone station to another, said spiral gear and said work gear beingdisposed so that the driving torque tends to move said driven shaftaxially for releasing the clutch members, a stop lever for preventingthe rotation of the turret whereupon the driving torque will release thedriving connection between the clutch members, said yielding meansoperating upon the release of the stop lever to establish drivingconnection of said clutch members, a stop movable with said worm gear,fa stop lever, avspring for moving the stop lever into the path oftravel of the stop for stopping the turret, means for moving said stoplever to release the turret for initiating the movement thereof, andmeans controlled by the turret for releasing the stop lever so that thespring may return the same to the path of travel of the stop forstopping the turret at the end of its feed cycle.

40. A `metal working machine comprising in combination, a supportingframe, a series of cyclically operating Work units each having itsindividual power operating mechanism, means for stopping said operatingmechanism onthe completion of a cycle of operation, means for eectingthe starting of a new cycle of operation,

a Work supporting turret mounted on said frame, independent poweroperable means for intermittently rotating said turret for presentingthe material operated upon in succession to the work units, a controlmea'ns for starting and for automatically stopping the turret at apredetermined set position, a control mechanism interconnecting thestarting means for the Work units with the rotating means for the turretand the starting means for the turret with the Work units, and operatingto simultaneously initiate the operation of the Work units as the turretcompletes its movement to a set position, and operating to initiate theoperation of the turret when all of the work units have completed theircycles of operation. l

EDWARD J. KINGSBURY.

GUNNAR SWAHNBERG-

